You’ve probably already figured out that many of these tips derive from my finding just such an error in something I read. This is another example.
Occasionally you’re likely to have a character who speaks a different language. When using a foreign language that you do not speak, be cautious when using translation software because it often doesn’t reflect the correct syntax. If possible, find a native speaker to confirm whether or not it’s correct.
This is another situation where it may slip right past most readers. However, if they have any knowledge of the language, whether it be French or Klingon, it’s advisable to make sure it’s properly represented. If your character is trying to speak a language of which they are not a native, then you could get away with this, but not if they should know the proper way to say it.